The predominant action at the upper course of a river is?

Yardangs are best described as?

A. long narrow ridges of sand lying parallel to the direction of the prevailing winds B. steep-side vertical bands of alternate hard and soft rocks aligned in the direction of the prevailing winds C. flat, table-like masses with very resistant horizontal top layers...
The predominant action at the upper course of a river is?

Grit is a good example of?

A. plutonic igneous rock B. volcanic igneous rock C. organically formed sedimentary rock D. mechanically formed sedimentary rock E. metamorphic rock Correct Answer: Option D – mechanically formed sedimentary rock

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